Pump-stirrup



C. D. BRANDT.

PUMP STIRRUP.

APPLICATION HLED ocT. 4, 1919.

1 ,339,943, Patented May 11, 1920.

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CHARLES D. BRANDT, OF NEW' YORK, N. Y., ASSGTOR @F ONE-HALF TO EUGENE J". SCHWEIZER, 0F O93), NF YGRK.

PUMP-STIRRUP.

Speccation of Letters Patent. Pittntd Mlgty 11;, 1920.

Application filet. @ctc-'cer 4, w19. Serial No. $28,497.

To all whom t may concern.'

Be it known that I, @Hannes D. BRANDT, a citizen of the United States, and a resident of Richmond Hill, borough and county of Queens, city and State of New York, have invented certain new and useful lmprovements in Pump-Stirrups, of which the following is a specification.

My invention relates to pumps and more particularly to air pumps for inflating pneumatic tires and the like and has for its object to provide a folding stirrup arrangement in which the st irrups are pivotally mounted and secured in position in a novel and efficient manner and in which the necessity for drilling and drill-holes is avoided. My invention will be fully described hereinafter and the features of novelty will be pointed out in the appended claims.

For illustrative and descriptive purposes, a specific embodiment of my invention is shown in the accompanying drawings in which Figure 1 is an elevation; Fig. 2 is a vertical section on the line 2-2 of Fig. 1 and Fig. 3 is a horizontal section on the line 3-3 of Fig. 2.

The pump itself may be of any well known and customary construction and, as shown, comprises the usual barrel 5 in which the piston is reciprocated, by means of a suitable piston rod and handle, in any recognized manner, these latter parts being omitted as unnecessary to the proper illustration of the invention The pump further is provided with the usual connection 6 for rthe detachable accommodation of the customary flexible hose whereby the pump is operatively connected with the pneumatic tire or other element to be inflated. As is generally customary, the one end of the barrel 5 is fitted and secured in a cap 7 with the interior with which the connection 6 is in communication In the present instance this cup 7 is continued in an axial direction in the form of a neck 8 which is constructed with a main recess 9 extending diametrically through said neck 8 and in an axial direction as shown in Fig. 9,. Auxiliary recesses 10 extend in correlated pairs in opposite directions toward the axis of the pump at intermediate portions of said neck and communicate with the main recesses 9 as shown in FigsA 1 and 3a The outer ends of said auxiliary recesses 10 are open and interrupt the periphery of said neck, while the inner ends thereof are closed, the inward length of said auxiliary recesses 10 from said periphery being predetermined as will be more fully described hereinafter.

rEhe construction further includes stirrup members 11 and 12 having foot rests 13 and toothed segments 14 arranged to mesh together, as shown in Fig. 2. rl`he stirrup members l1 and 12 are each providedwith trunnions 15 arranged in diametrically opposite pairs on each stirrup member and preferably forming integral parts thereof. 1n the assembled condition of the parts these trunnions are seated in the auxiliary recesses 10 and constitute the pivots upon which the stirrup members 11 and 12 are swung to and from their operative and inoperative positions. The stirrup members l1 and 12 are accommodated, in the main recess 9, which has a transverse width just suflicient to avoid interference with the pivotal movements of said members and to prevent undue vibration thereof, said foot rests 13 being` located exteriorly of the main recess 9 as shown. The trunnions 15 are dimensioned to fit the auxiliary recesses 10 without unnecessary looseness and the inward length of the latter is such as to provide for the proper meshing of the toothed segments 14.the inner ends of said auxiliary recesses 10 being located so as to constitute effcient bearings for said trunnions. The stirrup members 11 and 12 are maintained in position and the trunnions 15 are held against unintentional removal from the auxiliary recesses 10 by means of a resilient ring 16 of suitable material fitted into an annular channel 17 and extending circumferentially about the neck 8. The dimensions and location of the parts are so arranged that the ring-'16 bears against the segmental surfaces 18' of the stirrup members 11 and 12 and thus secures the latter against unintentional dislocation; the stirrup members 11 and '12 are formed with pockets 19 into which the ring 16 fits when the stirrup members are in their inoperative positions. In addition the stirrup members 11 and 12 may be provided with 0pposed surfaces 2O which, in the operative position of said members, abut and thus increase the rigidity of the construction.

ln assembling the parts the stirrup memassembled condition.

`The foot rests 13 andv with them the stirrup members 11 and 12 may now be pivlotally swung on the trunnions 15 to and from their operative and inoperative positions, the pressure of the ring 16 upon the 'segmental surfaces 18 preventing undue vibration of said members and foot rests during such movements. When the stirrup members 11 and 12 are in their operative positions, the foot rests 13 extend Vin oppo "site directions, in registry with each other f and may thus be placed upon a floor, roadway or the like to provide rests for the feet whereby the pump is held in place against upward movement when in use. The co` l'operating lsurfaces 20, by being Pressad against each other as the stirrup members A11 and 12 tend to pivotally swing when the pump piston is 'drawn upwardly, serve to increase the rigidity of the structure and its eiiciency as a pump. In the inoperative positions of the stirrup members 11 and 12 the'ring 16 lies within the pockets 19 while the foot rests 13 extend lengthwise of the barrel 5 and close thereto so as to occupy a minimum of space and to provide a compact arrangement in the folded condition of the parts.

The improved construction does away with machining of the parts and avoids the necessity for drilling rivet or pin-holes thus Vdoing away with the use of rivets or pins f which, under the strains incident to use, are

likely to work loose and thus reduce the V'efficiency of the pump as a mechanical structure.

easily cut or'otherwise produced in the neck,

The recesses, main and auxiliary, are

' while the trunnions 'are readily fashioned upon the stirrup members thus reducing the vcost of production to a minimum and increasing the field of usefulness of the ypump by making it available to a greater number of users because of its low cost.

The parts are quickly assembled and as quickly disassembled, thus reducing the cost of repairs and upkeep.

Various changes in the form shown and described may bemade within the scope of the claims without departing from the spirit of my invention.

I claim:

1. The combination of an air pump provided with inwardly extending open-ended recesses, arranged in cooperating pairs, a pair of stirrup members extending between said recesses, trunnions on said stirrup mem` bers extending into said recesses and constituting pivots for said members and means whereby said trunnions are maintained in said recesses.

2. The combination of an air pump, a cap at one end thereof having an axially extending main recess and transversel auxiliary recesses arranged in cooperating pairs and communicating with said main recess, said auxiliary recesses being open at their outer ends, stirrup members located in said main recess and between each pair of auxiliary recesses and movable to and from an operative position, trunnions on said stirrupmembers extending into said auxiliary recesses and constituting pivots for said members, an annular ring obstructing the open ends of said auxiliary recesses and engaging said stirrup members whereby said trunnions are maintained against removal from said auxiliary recesses and segmental gears on said stirrup members and meshing with each other whereby said members are pivotally movable in unison.

3. The combination of an air pump, a cap at one end thereof having an axially extending main recess and transverse auxiliary recesses arranged in coperating pairs and communicating with said main recess, said auxiliary recesses being open at their outer ends, stirrup members located in said main recess and between each pair of auxiliary recesses and movable to and from an operative position, trunnions on said stirrup members extending into said auxiliary recesses and constituting pivots for said members, an annular ring obstructing the open ends, of said auxiliary recesses and engaging said stirrup members whereby said trunnions are maintained against removal from said auxiliary recesses, said stirrup members having pockets for the accommodation of said ring when the stirrup members are in their inoperative positions andsegmental gears on said stirrup members and meshing with each other wherebysaid members are movable in unison.

1n testimony whereof` 1 have hereunto set my hand.

pivotally CHARLES D. BRA-KNHB 

